Cooper S Blow Off Valve (BOV)
Designed specifically for the BMW/Peugeot N18 engines, (Cooper S 2011 onwards, JCW Cooper S 2013 onwards, R58 Coupe 2012 onwards, Peugeot 208 GTi late 2012 onwards, RCZ THP 156 & 200 2011 on). This product is either recommended where the boost pressure has been increased by an ECU software upgrade or simply for those wanting a loud Blow off sound or simply as a solution to the many failures that have occurred.
The most common complaint on the OEM solenoid valve is a split diaphragm preventing the valve from opening fully, or not at all. This doesn’t always result in a check engine light as the valve can still be blown open by the boost pressure. We have seen many valves with this problem (see image below). The other problem is that diaphragm retaining ring is made from very thin plastic that goes brittle with heat cycles and oil contamination, and eventually fails. This prevents the diaphragm from sealing with the same problems as mentioned above. This particular failure also results in the valve falling apart upon removal from the turbo, though in extreme cases bits of plastic can enter the turbo and destroy it. (see image below).
Our alternative is a fully engineered solution offering both significantly improved reliability .Our valve is piston based , with no diaphragm to fail, and of all aluminium construction, it replaces the original unit with a pressure/vacuum operated piston valve that still also retains the desirable OEM ECU control over valve actuation. The valve has been proved on the VAG scene for many years. The spring is interchangeable for different levels of boost, and the solenoid is plug and play with the wiring harness which is included.
In order that you purchase the correct valve for your vehicle please refer to the fitment table below before ordering.
Product Code Fitment
FM207V Recirc Valve N14 Engines Cooper S 2007-10, JCW Cooper S 2007-2012
FMDVR60R Recirc Valve N18 Engines Cooper S 2011 On, JCW Cooper S 2013 on, 208 GTi 2012 on, RCZ THP 156 & 200 2011-on
FMDVMCS Blow Off Adaptor Plate For 2007/8 Cooper S Turbo only
FMDVR56A Blow Off Valve N14 Engines Cooper S 2007-10, JCW Cooper S 2007-2012
FMDVR60A Blow Off Valve N18 Engines Cooper S 2011 On, JCW Cooper S 2013 on, 208 GTi 2012 on, RCZ THP 156 & 200 2011-on
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